Telephone-receiver.



W. F. TAYLOR. TELEPHONE RECEIVER. APPLIGATION FILED AUG. a, 1908.

Patented June 7, 1910.

2 SHEETS-SHEET 1.

W; P. TAYLOR. lTELEPHONE RECEIVER. APPLICATION FILED AUG. 8, 1908.

Patented June '7, 1910.

2 SHEETS-SHEET 2.

UNITED STATES PATENT. oren.

WALTER F. TAYLOR, 0F BROOKLINE, MASSACHUSETTS, ASSIG-NOR T0 HOLTZERCABOTELECTRIC COMPANY, A CORPORATION 0F MASSACHUSETTS.

TELEPHONE-RECEIVER.

Specification of Letters Patent.

Patented June a, icio.

Application inea .Agust s, 190s. serial No. 447,575.

.specicatiom like letters on the drawings representing like parts.

The present invention `relates to a telephone receiver, and is embodiedin aireceiver of that type commonly used for tes ing purposes, orsometimes for telephoning,inwhicl1 type the circuit controller -iscontained in the receiver itself, instead of being controlled by aswitch hook, or similar device.

The purpose of` the invention is to simplify the construction so thatall the parts are easily accessible for repairwhen the cap and diaphragmare removed.

The invention further relates to means for locking the diaphragmafterthe same has been adjusted with relation to the polar eX- tremities ofthe magnet.

In accordance with the invention, the switch terminals are mounted on asupport of insulatin 'material just below the diaphragm an arranged tobe bridged by -means of a rocker arm provided with a suitable externalactuating device located outside of the recelver case, the o ening ofthe vswitch being manually contro ed or automatically controlled, as maybe desired. The bridging member of the switch is also located on theoutside of the support ofinsulating material, so that all the` workingparts are exposed when the cap phragm have been removed.

Figure 1 is a top plan view, on an enlarged scale, of a receiverembodying the invention, with the ca and diaphragm removed from Ythecase; ig. 2 is a transverse section of the same on line m2, Fig. 1, withthe cap and diaphragm on; Fig. 3 is' a view, similar to Fig. 1, showinga modification; Fig. 4 is a top plan view with a and dia- `portion ofthe cap and diaphragm broken away, this view showing a furthermodification; and Fig. 5 is an elevation of the device shown in Fig. 4,with a portion of the case broken away to show the switch withln.

The receiver, embodying the invention, comprises the electro-magnets acontained 1n an inclosing case b, across the face of which,

as shown in Fig. 2, the diaphragm c is held by the removable cap d,having an opening d2 1n the center. The cap and diaphragm are fastenedtogether, the diaphragm being held in place by a ring c2. The cap isscrewed on the casing, and the position of the diaphragm with relationto polar eX- tremityv of the magnet can thus be adjusted by turning thecap. After the proper ad- ]ustment has been made, the cap is preventedfrom turning by a locking device of any sultable or usual construction,said locking device being herein shown as consisting of a member c3radially mounted on a pin c4 rotatably mounted in the case and having aj screw head` c5 at the back of the case, so that it can be turned toforce the member c3 into engagement with case and cap, as shown. Thecircuits through the magnets are the same as those commonly employed,and need -not, therefore, be traced in connect-ion with thisdescription. The circuit terminals, howl ever, in accordance with theinvention, consist of springs'e and f which are mounted fon a support h.of insulating material and l adapted to be bridged by means of a rockeri g in order to close the circuit when the receiver is in use. Thisrocker g is mounted I on a vertical pivot vg2 located between theterminal springs e and f and having a bearing in the support h, so thatby moving said rocker on its pivot from the position shown in Fig. 1,one end of the rocker will come in contact with the terminal f withoutdisconnectin'g thev other end of the rocker from the terminal" e, sothat the two terminals are bridged and the circuit is closed. Thisrocker g' is provided with any suitable actuating device or devicesconveniently located outside of the case b.

In'the construction shown in Fig. 1, the pivotalsupport g2l is providedatfits lower end with a cross arm g3 having push rods g4 and g5pivotally connected with it atop-V posite ends and extending throughopenings. through the side of the case b. In this constructlon, when thereceiver is to be used, the push rod g4 is operated, thus bringing therocker g into position to close the circuit, and when the receiver is nolonger in use, the push rod g5 is operated to break the circuit. v

In the construction shown in Fig. 3, the opening of the circuit isautomatic, the terminal e being replaced by a spring el which tends tohold the rocker g in the position shown, except when' the push rod g4 1soperated to move the rocker against the stress of the spring. In thiscase, the person using the receiver must keep the push rod g4L depressedwhile the receiver is in use, thus closing the circuit through thespring c1", rocker g, and contact memberf, the circuit, however, beingautomatically opened as soonas the push rod y* has been released.l

In Figs. 4 and 5, the actuating member for the rocker g is shown asconsisting of a swinging radial arm g4 connected with the pivotalsupport for the rocker g, and projecting outward through an opening orslot b2 in the wall of the case b. In this conv struction, the switch isopened or closed by a lateral movement of the arm g4, the on and offposition beingl indicated by the words printed upon the receiver, asshown in Fig. 5.

The magnet cores' are provided at the back with lateral extensions 2adapted to be supported against the rear wall of the case b. The supporth is secured to the lateral exl tensions 2 by means of bolts 3, the saidsupport L being separated from the extensions 2 by one or moreinterposed metallic members 7c, thus affording a space behind thesupport for the leading-in wires, and at the same time bringing theterminals and the switch which are on the face of the support near thefront of the receiver just below the cap.

Claims.

1. In a telephone receiver, a casing provided with a cap and dia hragmadapted lto be secure to the open en of the caslng; an electro-magnetcontained in said casing; a

supporting member of insulating material located between the diaphragmand the base of the electro-magnet, 'thereby aordinga space within thecasing for the leading-1n wires; switch terminals mounted on the outersurface of the said support; a switch also mounted onv the outer surfaceof said support and adapted to bridge the' terminals; and an actuatingdevicefor said switch extending through the wall of the casing,substantially as described. g

2. In a telephone receiver, the combination with the case; of theelectro-magnet therein; a support of insulating material surroundingsaid electro-magnet; switch terminals mourted on the ouer surfaceuofsaid sup ort; a rid mem er ivota y connectped with sailnsgilpport anldlocatedbetween said terminals; and a push rod connected with said memberat one side 'of the pivotal support thereof projecting outward throughan opening in said receiver case.

3. The combination with the receiver case; of the screw-threaded cap andthe diaphragm secured in said cap; the electromagnet; a locking memberconsisting of an arm adapted to be forced against the inner wall of thecasing to hold the cap in its Iadjusted position; and a rotatingactuating member from which said arm extends radially, said member beingaccessible'at the outside of the case.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

. WALTER F. TAYLOR.

Witnesses:

M. E.'CovENEY, JAMES J. MALONEY.

